[目的]研究冀中南地区小麦-玉米周年种植节水生产新途径。[方法]试验设玉米灌浆后期不浇水,在小麦播前10、20 d浇水3个处理,不浇水处理为对照,研究“一水两用”技术对玉米产量及小麦播前耕层墒情及0~200 cm土层储水效果的影响。[结果]与对照相比,小麦播前10、20 d浇水对玉米穗粒数影响不大,但能明显提高千粒重和产量,增产率分别达5.9%和8.4%;耕层含水量分别平均增加11.0%、6.4%;0~200 cm土壤储水量分别增加771.0、663.5 m~3/hm~2。小麦播前20 d浇水对夏玉米增产效果较好,而小麦播前10 d浇水对提高土壤墒情及增加0~200 cm土壤储水量效果较好,从节约水资源,促进农业可持续发展角度考虑,采用小麦播前10 d浇水技术意义更大。[结论]该研究可为夏玉米灌溉提供参考。 [Objective] The research aimed to study a new way of water saving production of wheat-corn annual planting in central-southern Hebei. [Method] The corn without watering in the later stage of grain filling was planted. Three treatments were watered at 10 and 20 days before wheat sowing, and no watering treatment was taken as control. The effects of Soil moisture condition and the effect of water storage in 0 ~ 200 cm soil layer. [Result] Compared with the control, the watering of wheat before sowing 10 and 20 d had little effect on the number of ears per spike, but significantly increased the 1000-grain weight and the yield, the yield increasing rates reached 5.9% and 8.4% respectively. Increased by 11.0% and 6.4% respectively. Soil water storage at 0 ~ 200 cm increased by 771.0 and 663.5 m ~ 3 / hm ~ 2, respectively. Watering of wheat 20 days before sowing increased the yield of summer maize better, while the watering of wheat 10 days before sowing increased soil moisture and increasing soil water storage 0-200 cm better, from conserving water resources and promoting sustainable development of agriculture Point of view, the use of wheat before sowing 10 d water technology is even more meaningful. [Conclusion] This study can provide reference for summer maize irrigation.